EP 0394492 B1 19941012 - ELECTROMAGNETICALLY DRIVEN VALVE CONTROLLER.
Title (en)
ELECTROMAGNETICALLY DRIVEN VALVE CONTROLLER.
Title (de)
ELEKTROMAGNETISCH ANGETRIEBENE VENTILREGELUNGSEINHEIT.
Title (fr)
UNITE DE COMMANDE DE SOUPAPES A ACTIONNEMENT ELECTROMAGNETIQUE.
Publication
Application
Priority
- JP 8901080 W 19891020
- JP 26483188 A 19881020
Abstract (en)
[origin: WO9004705A1] An electromagnetically driven valve controller which electromagnetically controls the valves that open and close intake and exhaust ports through which the interior of the cylinder of an engine is communicated with the exterior. When the engine is in operation so far, it is not allowed to change the timings for opening and closing the intake and exhaust valves. Therefore, the opening and closing timings have been so set that a high efficiency is obtained when the engine is operated at a predetermined number of revolutions. When the engine runs at a speed slower than the predetermined number of revolutions, however, there takes place blow-by phenomenon or prefiring phenomenon resulting in the decrease in the engine efficiency and output. Therefore, the intake and exhaust valves are opened and closed by the electromagnetic force to change the opening and closing timings depending upon the number of revolutions of the engine, thereby to prevent the blow-by phenomenon or the prefiring phenomenon from developing and to improve the efficiency and output of the engine.
IPC 1-7
IPC 8 full level
F01L 9/04 (2006.01); F01L 9/20 (2021.01); F02D 13/02 (2006.01)
CPC (source: EP US)
F01L 9/20 (2021.01 - EP US)
Citation (examination)
- FR 1543283 A 19681025
- Automotive Engineering Vol. 88 Nr. 10 pages 120-124; Design Engineering Sept. 1985 page 11
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9004705 A1 19900503; DE 68918845 D1 19941117; DE 68918845 T2 19950216; EP 0394492 A1 19901031; EP 0394492 A4 19910417; EP 0394492 B1 19941012; JP H02112606 A 19900425; US 5125370 A 19920630
DOCDB simple family (application)
JP 8901080 W 19891020; DE 68918845 T 19891020; EP 89911615 A 19891020; JP 26483188 A 19881020; US 49933890 A 19900618